Hot-blast stove.



R. s. MOORE.

HOT BLAST STOVE.

APPLICATION FILED SEPT. 10, 1 909.

Patented Sept. 20, 1910.

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nALiH swrrznn MOORE, OF WEs'rMrNs'rEa, LONDON, ENGLAND.

HOT-BLAST STOVE.

Specification of Letters Patent. Patented Sept. 20, 1910 Application filed September 10, 1909. Serial No. 517,109.

To all whom it may concern:

Be it known that I, RALPH Swrrznn MOORE, a citizen of the United States of America, residing at Grosvenor Mansions,

`82 Victoria street, Westminster, London,

England, have invented new and useful Improvements in or Connected with Hot-Blast Stoves, of which the following is a specification.

This invention relates to improvements in hot-blast stoves of the kind known as the three-pass type, the object of the invention being to provide improved means for cleansing the checker passages of dust which accumulates therein in the operation of the stove. To this end according to my invention, I construct a stove in which the outer and intermediate passes open at their lower vends into segmental chambers which are provided by forming radial partitions between the parts in the wall separating the said two passes; each of the segmental chambers so formed is fitted with an air relief valve. Vith this construction, when changing stoves in the ordinary manner, the air inclosed within a stove, and which is under pressure, passes down the checker work of the outer and intermediate passes, but only down those sections thereof which ai'e adjacent to the air relief valve or valves which has or have been opened so that a current or rush of air is obtained, which current acts 1n con]unct1on with gravity for removing from the checker passages, dust which has accumulated therein in the course of the operation of the stove.

To enable the invention to be fully understood, I will describe it by reference to the accompanying drawing, in which Figure 1 is a sectional elevation of a three-pass stove having the improvements applied thereto. Fig. 2 is a horizontal section on the line 2-2 Fig. l, and Fig. 3 is a developed section on the line 3-3 Fig. 2.

a is the innermost pass of the stove, b is the intermediate pass, and c is the outermost pass thereof, these three passes being constituted by the three cylindrical and concentrically arranged walls el, e, and f. The intermediate wall e is spanned by the dome g so that the innermost pass a, is in communication with the intermediate pass I) at its upperend, while the latter at its lower end is in communication with the lower part of the outermost pass c, the upper end o which communicates with the flue h of the stove. The communication between the intermediate and outermost passes I) and c respectively at the lower end is eHected through the ports z', z'. is the inlet for the combustible gas into the innermost pass a, and la is the air inlet passage, these two passages uniting at the bottom of the said pass a.

The foregoing parts are of known construction.

Z, Z and m, m are two series of radial partitions which are located at the lower ends of the outermost and intermediate passes c and b respectively between the ports z', Vi in the intermediate wall e, the said radial partitions forming a series of segmental chambers n., each of which is in communication with a segmental portion of the intermediate and outermost passes b and c of the stove. Each of the outer segmental chambers n thus provided at the lower part of the stove is fitted with an air relief valve o which may be of any convenient construction, and by opening which the said segmental chamber to which it is fitted can be placed in cornmunication with the atmosphere.

With this construction of hot-blast stove, when the stove is reversed or changed in the ordinary manner, and one or more of the air valves o is or are opened, the air which is inclosed within the passes of the stove, and which is at a pressure above that of the atmosphere, escapes down those sections of the intermediate and outermost passes?) and c which are adjacent to the air valves 0 which have been opened, the rush of air which thus takes place acting in conjunction with gravity for cleansing the sections of the passages of the dust which has accumulated therein during the previous operation of the stove.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a hot blast stove of the kind described, the combination with the outer and intermediate passes, of segmental chambers with which the lower ends of the said passes communicate and of air relief valves fitted in the outer wall of said segmental chambers by means of which each of the latter can be placed in communication with the atmosphere independently of the other.

2. In a hot blast stove of the kind described, the combination with the outermost and intermediate passes, of segmental chambers in communication with the lower ends of said passes, the said segmental chambers being formed by radial partitions provided in the lower part of the stove between the ports in the intermediate wall and of air re lief valves litted in the outer wall of the seg-` mental chambers, whereby each chamber can ybe put in communication with the atmosphere, independently of the other.

3. A three pass stove provided at its bottom with .partitions in the outer and inter- 

